Automatic clock-controlled switch-operating device



S. JOHNSEN.

AUTOMATIC CLOCK CONTROLLED SWITCH OPERATING DEVICE.

APPLICATION FILED DEC. 19, 1919- I Patented Oct. 11, 1921.

7 UNITED STATES" PATENT OFFICE.

svnnn JOHNSEN, or wINnIr-ne, MANITOBA, CANADA.

A TOMATIC CLOCK-CONTROLLED swrrcn-ornaarme nnvron.

Application filed December 19, 1919. Serial No.

. vention is to devise a simple means whereby an electrical switch may be automatically operated after apredetermined interval of time.

A further object is to arrange the appliance as a permanent atachment to an alarm clock and such that the various spindles of the clock can be manipulated in the ordinary way for setting or winding purposes.

A still further object is to construct the parts in an inexpensive, easily assembled and durable manner.

With the above objects in view the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described and later pointed out in the appended claim, reference being had to the accompanying drawing in which Figure 1 is a front view of an alarm clock fitted with my attachment.

Fig. 2 is a side view thereof.

Fig. 3 is a rearview of the clock with the attachedcasing removed, to show the working parts.

F ig. 4 is a perspective view of a modified arrangement of switch.

In the drawing like characters of reference indicate corresponding parts in the several figures.

1 represents an alarm clock of ordinary type which is provided as is customary at the rear with a main winding stem 2, the main hand setting stem 1, the alarm hand setting stem 3 and the alarm winding stem 5. Under ordinary conditions the ends of thesestems which protrude beyond the back of the clock are provided with finger pieces for operating purposes.

These I dispense with and to them I a tach controlling spindles later described which are actually extensions of the stems.

To the back of the clock I secure permanently by bolts 6 and 7 a vertically disposed insulating block 8, the stem 5 actually pro- Specification of Letters Eatent.

truding through this block.

On the block Imount an L-shaped bracket 9 which is fastened to the block by thebolts. The lower "part of the bracket extends rearwardly at right angles vided with two outstanding wings l0 and 11 and two upstanding lugs 12 and 13. To the wings I secure permanently as by screws 14 a horizontally disposed base plate 15 of insulating material. To the plate I fasten two contact bars l6and 17 fitted with sub stantially V-shapedcontact ends 18 and 19 which overhang the plate 15.

20 and 21 are electrical lead wires connected to the bars and plug 22. In the present 20 I insert a lamp an electric lamp 24-.

2-5 represents a knife switch adapted to make electrical contact with the ends 18 and 19 of the bars. This switch is carried by a substantially L-shaped rocker arm 26 pivotally mounted on a cross pin 27 carried by the lugs 12 and 13. 28 is a flat spring fastened by the bolt 6 and engaging the upwardly extending part of the rocker arm and designed to normally hold the knife switch down or out of contact with the bar contacts.

To the upper end of the rocker arm I con.- nect a setting bar 29 which extends to the side and is utilized when pressed toward the leading to. a screw instance in the wire socket 23 supplied with clock to put the knife switch in contact with the ends 18 and 19 of the bars 16 and 17 and thereby close the circuit through the wires 20 and 21. V

The parts so attached to the back of the clock are all inclosed within a cylindrical casing 30 fastened to the clock by suitable side clips 31. 32, 38, 34 and 35 are inde pendent extension spindles having their forward ends connected to the stems 2, 5, 1 and 3 respectively and their rear ends projecting out through the back of the casing 30 and fitted with suitable finger grips 36. These spindles are simply extensions to the back of the casing to allow of the manipulation of the stems after the casing has been fastened to the clock. The casing is fitted with a side slot 37 and when the parts are assembled the setting bar 29 extends outwardly through the slot.

To the spindle 33 I secure a pair of outwardly extending diametrically opposing lugs or cars 38 and 39, one of which in the outwardly pressed position of the free end Patented Oct. 11, 1921 i from the clock and is prolVhile I have described a lamp in the circuit, it will be readily understood that any electrical appliance could be placed in the circuit at this point which appliance would be controlled directly by the operation of the switch.

Assuming a lamp used and that one wishes that the lamp be turned off at a pre determined time, it is only necessary to turn. the alarm spindle 35 to set the alarm hand at the selected time, then wind the alarm spindle and just before the winding is tinished to press the lever 29 ahead so that when one has completed the winding action the free end of the bar 26 will be held against moving baekwardly by contact with one of the lugs 38 or 39. Then, by screwing the plug 22 into the ordinary lamp socket which communicates with a source of electro-motive force the appliance can be left and will automatically work to extinguish. the lamp just as soon as the said hour has arrived. This action occurs in the following way At the time the alarm goes off the stem 5 turns, with the result that the lug 38 or 39 swings away from the rocker bar 26 and the freed rocker bar is immediately swung over by the spring to break contact at the knife switch.

In Fig. i I have shown a modified form of contact and knife switch which if supplied instead of that shown in Fig. 3 will act to turn on the light at a set time instead of turn it off. This is accomplished by simply reversing the position of the contacts 18 and 19 in respect to the knife switch so point of the action shown in Fig. 3, 1 have not entered into a minute description of it and do not desire to be limited to either one or other of the knife switch ar'angements when constructing as this would simply be a matter of choice, depending on whether one desired the circuit open or closed at the time the alarm goes oil.

What 1 claim as my in vention is A time controlled switchingdevice comprising a base plate, stationary contacts mounted thereon, an L shaped bracket mountedon said base plate. an L-shaped contact having the lower horizontal arm thereof pivotally supported upon the corresponding arm of said bracket and arranged to cooperate with said stationary contacts, a spring interposed between the vertical arms of the bracket and contact normally tending to force the latter outwardly from the bracket. a handle operative to move the bracket to a setposition againstthe resistance of said spring, and releasable means engageable with said bracket to hold the same in a set position for a. definite period of time adapted to automatically release the contact at a predetermined time.

Signed at lVinnipeg, this day of November, 191$).

' SVEND JOHNSEU. in the presence of- G. S. RQXHUGH,

H. B. VVAKEFIELD. 

